CN210597443U - Safety device of construction vehicle traveling system and construction vehicle - Google Patents
Safety device of construction vehicle traveling system and construction vehicle Download PDFInfo
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- CN210597443U CN210597443U CN201921000969.3U CN201921000969U CN210597443U CN 210597443 U CN210597443 U CN 210597443U CN 201921000969 U CN201921000969 U CN 201921000969U CN 210597443 U CN210597443 U CN 210597443U
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Abstract
The utility model discloses a construction vehicle traveling system's safety device and construction vehicle relates to safety guarantee technical field to solve to a certain extent among the prior art because operating personnel mistake bumps the action bars in the construction operation and lead to construction vehicle to remove and long distance to advance the technical problem that needs operate the action bars for a long time. The safety device of the construction vehicle traveling system includes: the oil inlet pipe comprises a change-over switch, a knob switch, a switch valve, a pressure reducing valve, a first oil inlet pipe and a second oil inlet pipe; the switching valve is communicated with a first oil inlet pipe or a second oil inlet pipe, the first oil inlet pipe is used for supplying oil to a pilot valve of the traveling system, the second oil inlet pipe is communicated with a pressure reducing valve, and the pressure reducing valve is communicated with a forward oil pipe or a backward oil pipe of the pilot valve through an oil supply pipe; the change-over switch is electrically connected with the switch valve and is used for controlling the on-off of the first oil inlet pipe and the second oil inlet pipe; the knob switch is electrically connected with the pressure reducing valve and used for controlling the on-off of a forward oil pipe or a backward oil pipe of the pilot valve.
Description
Technical Field
The utility model belongs to the technical field of the safety guarantee technique and specifically relates to a construction vehicle traveling system's safety device and construction vehicle are related to.
Background
In the current engineering machinery, the use of the excavator is greatly popularized and applied, and the safety of excavator operation and the humanized practicability of operators become main concern factors of various host manufacturing companies, research and development mechanisms and customers.
In the actual operation of the excavator, the walking of the excavator is a common action, and at present, the walking of the excavator mainly depends on the control of an operator on a walking handle (pedal) to operate a walking pilot valve so as to realize the walking function of a machine. When the excavator performs an excavating operation at a certain position and a walking function is not required, an operator may touch a walking control lever due to careless operation, and the excavator may walk. If the machine is in operation on a high slope, great potential safety hazard exists. In addition, when the operator works in the field, the operator can walk straight for a long distance, and at the moment, the operator needs to operate the walking control lever for a long time in a relatively narrow space, so that the workload of the operator is increased.
Therefore, it is urgently needed to provide a safety device of a traveling system of a construction vehicle, so as to solve the technical problem that in the prior art, due to the fact that an operator accidentally touches an operating rod during construction operation, the construction vehicle may move and long-distance traveling needs to be carried out for a long time on the operating rod.
SUMMERY OF THE UTILITY MODEL
The utility model provides a construction vehicle traveling system's safety device and construction vehicle to solve to a certain extent among the prior art because construction vehicle in construction operation, operating personnel mistake bumps the action bars, probably can make construction vehicle remove and long distance advance need be long-time to the technical problem of action bars operation.
The utility model provides a construction vehicle traveling system's safety device, include: the oil inlet pipe comprises a change-over switch, a knob switch, a switch valve, a pressure reducing valve, a first oil inlet pipe and a second oil inlet pipe; the switching valve is communicated with the first oil inlet pipe or the second oil inlet pipe, the first oil inlet pipe is used for supplying oil to a pilot valve of a traveling system, the second oil inlet pipe is communicated with the pressure reducing valve, and the pressure reducing valve is communicated with a forward oil pipe or a backward oil pipe of the pilot valve through an oil supply pipe; the change-over switch is electrically connected with the switch valve and is used for controlling the connection and disconnection of the first oil inlet pipe and the second oil inlet pipe; the knob switch is electrically connected with the pressure reducing valve and used for controlling the on-off of a forward oil pipe or a backward oil pipe of the pilot valve.
The change-over switch comprises an opening gear and a first closing gear; the first closing gear is used for enabling the switch valve to be communicated with the first oil inlet pipe, and the opening gear is used for enabling the reducing valve to be communicated with the second oil inlet pipe.
Specifically, the knob switch comprises a forward gear, a backward gear and a second off gear;
the forward gear is used for enabling the reducing valve to be communicated with the forward oil pipe of the pilot valve, the backward gear is used for enabling the reducing valve to be communicated with the backward oil pipe of the pilot valve, and the second closing gear is used for enabling the reducing valve to be disconnected with both the forward oil pipe and the backward oil pipe of the pilot valve.
Furthermore, the pilot valve also comprises a pilot valve oil inlet pipe and a pilot valve oil outlet pipe; one end of the pilot valve oil inlet pipe is communicated with the switch valve through the first oil inlet pipe, and the other end of the pilot valve oil inlet pipe is communicated with a pilot valve oil inlet of the pilot valve; one end of the pilot valve oil outlet pipe is communicated with the pilot valve oil outlet, and the other end of the pilot valve oil outlet pipe is communicated with the hydraulic oil tank.
Furthermore, the oil pipe of the pressure reducing valve comprises a pressure reducing valve oil inlet pipe and a pressure reducing valve oil outlet pipe; one end of the oil inlet pipe of the pressure reducing valve is communicated with the switch valve through the second oil inlet pipe, and the other end of the oil inlet pipe of the pressure reducing valve is communicated with the pressure reducing valve; one end of the pressure reducing valve oil outlet pipe is communicated with an oil outlet of the pressure reducing valve, and the other end of the pressure reducing valve oil outlet pipe is communicated with the hydraulic oil tank.
The pressure reducing valve is divided into a first pressure reducing valve and a second pressure reducing valve; the oil inlet pipe of the pressure reducing valve is divided into a first pressure reducing valve oil inlet pipe and a second pressure reducing valve oil inlet pipe; the oil outlet pipe of the pressure reducing valve is divided into a first pressure reducing valve oil outlet pipe and a second pressure reducing valve oil outlet pipe; one end of the first pressure reducing valve oil inlet pipe is communicated with a pressure reducing valve oil inlet of the first pressure reducing valve, one end of the second pressure reducing valve oil inlet pipe is communicated with a pressure reducing valve oil inlet of the second pressure reducing valve, and the other end of the first pressure reducing valve oil inlet pipe is converged and communicated with the other end of the second pressure reducing valve oil inlet pipe and is communicated with the second oil inlet pipe; one end of the first pressure reducing valve oil outlet pipe is communicated with a pressure reducing valve oil outlet of the first pressure reducing valve, one end of the second pressure reducing valve oil outlet pipe is communicated with a pressure reducing valve oil outlet of the second pressure reducing valve, and the other end of the first pressure reducing valve oil outlet pipe is converged and communicated with the other end of the second pressure reducing valve oil outlet pipe and is communicated with the hydraulic oil tank.
Furthermore, the forward oil pipe comprises a first forward oil pipe and a second forward oil pipe, and the backward oil pipe comprises a first backward oil pipe and a second backward oil pipe; the number of oil inlets and the number of oil outlets of the first reducing valve and the second reducing valve are multiple; oil outlets of the first pressure reducing valves are respectively communicated with the first forward oil pipe and the second forward oil pipe, and oil inlets of the first pressure reducing valves are respectively communicated with the first backward oil pipe and the second backward oil pipe; oil outlets of the second pressure reducing valves are respectively communicated with the first backward oil pipe and the second backward oil pipe, and oil inlets of the second pressure reducing valves are respectively communicated with the first forward oil pipe and the second forward oil pipe.
Furthermore, the switch valve is an electromagnetic switch valve, and the first pressure reducing valve and the second pressure reducing valve are electromagnetic pressure reducing valves.
Compared with the prior art, construction vehicle traveling system's safety device have following advantage:
the utility model provides a construction vehicle traveling system's safety device, include: the oil inlet pipe comprises a change-over switch, a knob switch, a switch valve, a pressure reducing valve, a first oil inlet pipe and a second oil inlet pipe; the switching valve is communicated with a first oil inlet pipe or a second oil inlet pipe, the first oil inlet pipe is used for supplying oil to a pilot valve of the traveling system, the second oil inlet pipe is communicated with a pressure reducing valve, and the pressure reducing valve is communicated with a forward oil pipe or a backward oil pipe of the pilot valve through an oil supply pipe; the change-over switch is electrically connected with the switch valve and is used for controlling the on-off of the first oil inlet pipe and the second oil inlet pipe; the knob switch is electrically connected with the pressure reducing valve and used for controlling the on-off of a forward oil pipe or a backward oil pipe of the pilot valve.
Therefore, the safety device of the construction vehicle traveling system provided by the utility model has the advantages that the on-off of the switch valve is controlled by the change-over switch, so that the on-off of the first oil inlet pipe and the second oil inlet pipe is controlled; the knob switch controls the on-off of the pressure reducing valve, thereby controlling the on-off of the forward oil pipe or the backward oil pipe.
When the change-over switch is switched on, the change-over switch is disconnected with the switch valve, so that the first oil inlet pipe is disconnected with the pilot valve. Therefore, the operating personnel can not operate and control the traveling system, and the problem that the operating personnel mistakenly touch the operating rod to move the construction vehicle is solved.
When change over switch and knob switch all switch-on, change over switch and the disconnection of being connected of ooff valve to make the first intercommunication disconnection of advancing oil pipe and pilot valve, knob switch and relief pressure valve intercommunication, thereby make oil pipe or the oil pipe switch-on of retreating of advancing, thereby avoided construction vehicle long distance to advance and need long-time technical problem to the action bars operation.
Wherein, the utility model also provides an excavator, including foretell construction vehicle traveling system's safety device, still include: a first operating lever and a second operating lever; the first operating rod comprises a first oil supply interface and a second oil supply interface, and the second operating rod comprises a third oil supply interface and a fourth oil supply interface; the first oil supply interface and the second oil supply interface are respectively and correspondingly communicated with the first forward oil pipe and the first backward oil pipe; the third oil supply interface and the fourth oil supply interface are respectively corresponding to the second forward oil pipe and the second backward oil pipe.
Specifically, the excavator provided by the utility model also comprises a main controller; the main controller is electrically connected with the change-over switch, the knob switch, the switch valve and the first pressure reducing valve and the second pressure reducing valve through signal lines respectively.
Compared with the prior art, the excavator has the same advantages as the safety device of the construction vehicle traveling system, and the detailed description is omitted.
To summarize, the embodiment of the present invention provides a safety device for a traveling system of a construction vehicle, which mainly has the following advantages:
the operation is convenient, the oil way of the traveling system can be cut off in a construction state, and the problem that an operator mistakenly touches an operating rod to move a construction vehicle is avoided;
secondly, the device can continuously move forwards or backwards through the knob switch, and the problem that long-time operation of the operating rod is needed when the device moves for a long distance is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an overall connection schematic diagram of a safety device of a construction vehicle traveling system according to an embodiment of the present invention;
fig. 2 is a schematic view of a safety device change-over switch of a traveling system of a construction vehicle according to an embodiment of the present invention when the change-over switch is in an open position;
fig. 3 is a schematic view of a knob switch in a safety device of a traveling system of a construction vehicle according to an embodiment of the present invention at a forward gear;
fig. 4 is a schematic diagram of the safety device of the traveling system of construction vehicle according to the embodiment of the present invention when the knob switch is in the backward gear position.
In the figure: 1-a diverter switch; 2-a knob switch; 3-switching valve; 401-a first pressure relief valve; 402-a second pressure relief valve; 5-a pilot valve; 501-a pilot valve oil inlet pipe; 5011-a pilot valve oil inlet; 502-pilot valve outlet line; 5021-a pilot valve oil outlet; 6-a first oil inlet pipe; 7-a second oil inlet pipe; 801-first forward tubing; 802-a second forward tubing; 901-first receding oil pipe; 902-a second retract tubing; 10-a hydraulic oil tank; 11-a pressure reducing valve oil inlet pipe; 1101-a pressure reducing valve oil inlet; 1102-a first reducing valve oil inlet pipe; 1103-a second pressure reducing valve oil inlet pipe; 12-a pressure reducing valve oil outlet pipe; 1201-pressure reducing valve oil outlet; 1202-a first pressure reducing valve oil outlet pipe; 1203-a second relief valve oil outlet pipe; 13-a first operating lever; 1301-a first oil supply interface; 1302-a second oil supply interface; 14-a second operating lever; 1401-a third oil supply interface; 1402-fourth oil supply interface; 15-a main controller;
a-forward gear; b-backward gear.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the system or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is an overall connection schematic diagram of a safety device of a construction vehicle traveling system according to an embodiment of the present invention; fig. 2 is a schematic diagram of a safety device switch valve cut-off implementation of a traveling system of a construction vehicle provided in an embodiment of the present invention; fig. 3 is a schematic view of a safety device of a traveling system of a construction vehicle according to an embodiment of the present invention; fig. 4 is a schematic view of the embodiment of the present invention for implementing linear backward movement in the safety device of the traveling system of a construction vehicle.
As shown in fig. 1-4, the embodiment of the present invention provides a safety device for a traveling system of a construction vehicle, including: the oil-gas separation device comprises a change-over switch 1, a knob switch 2, a switch valve 3, a pressure reducing valve, a first oil inlet pipe 6 and a second oil inlet pipe 7; the switching valve 3 is communicated with a first oil inlet pipe 6 or a second oil inlet pipe 7, the first oil inlet pipe 6 is used for supplying oil to a pilot valve 5 of the traveling system, the second oil inlet pipe 7 is communicated with a pressure reducing valve, and the pressure reducing valve is communicated with a forward oil pipe or a backward oil pipe of the pilot valve 5 through an oil supply pipe; the change-over switch 1 is electrically connected with the switch valve 3 and is used for controlling the connection and disconnection of the first oil inlet pipe 6 and the second oil inlet pipe 7; the knob switch 2 is electrically connected with the pressure reducing valve and is used for controlling the on-off of a forward oil pipe or a backward oil pipe of the pilot valve 5.
Compared with the prior art, the utility model discloses a construction vehicle traveling system's safety device has following advantage:
in the safety device of the construction vehicle traveling system provided by the utility model, the change-over switch 1 controls the on-off of the switch valve 3, thereby controlling the on-off of the first oil inlet pipe 6 and the second oil inlet pipe 7; the knob switch 2 controls the on-off of the pressure reducing valve, thereby controlling the on-off of the forward oil pipe or the backward oil pipe.
When the change-over switch 1 is turned on, the connection between the change-over switch 1 and the on-off valve 3 is cut off, so that the communication between the first oil inlet pipe 6 and the pilot valve 5 is cut off. Therefore, the operating personnel can not operate and control the traveling system, and the problem that the operating personnel mistakenly touch the operating rod to move the construction vehicle is solved.
When change over switch 1 and rotary switch 2 all switch-on, change over switch 1 and the disconnection of being connected of ooff valve 3 to make the first intercommunication disconnection of advancing oil pipe 6 and pilot valve 5, rotary switch 2 and relief pressure valve intercommunication, thereby make oil pipe or the oil pipe switch-on of retreating of advancing, thereby avoided construction vehicle long distance to advance and need long-time technical problem to the action bars operation.
As shown in fig. 1 to 4, the change-over switch 1 includes an on-position and a first off-position; the first off position is used to communicate the on-off valve 3 with the first oil feed pipe 6, and the on position is used to communicate the pressure reducing valve with the second oil feed pipe 7.
When the change-over switch 1 is located at an opening gear, the change-over switch 1 is disconnected with the switch valve 3, the first oil inlet pipe 6 is disconnected with the switch valve 3, the second oil inlet pipe 7 is communicated with the pressure reducing valve, the traveling system cannot control the construction vehicle, the knob switch 2 can control the construction vehicle to advance or retreat, and the traveling system is locked in a construction state.
Specifically, as shown in fig. 1 to 4, the rotary switch 2 includes a forward gear a, a reverse gear B, and a second off gear; the forward gear A is used for enabling the reducing valve to be communicated with a forward oil pipe of the pilot valve 5, the backward gear B is used for enabling the reducing valve to be communicated with a backward oil pipe of the pilot valve 5, and the second closing gear is used for enabling the reducing valve to be disconnected with both the forward oil pipe and the backward oil pipe of the pilot valve 5.
When the change-over switch 1 is located at an opening gear and the knob switch 2 is located at a second closing gear, the change-over switch 1 is disconnected from the switch valve 3, the knob switch 2 is disconnected from the pressure reducing valve, and the whole circuit is in a disconnected state;
when the change-over switch 1 is located at the opening gear, and the knob switch 2 is located at the forward gear A or the backward gear B, the change-over switch 1 is disconnected from the switch valve 3, the knob switch 2 is connected with the pressure reducing valve, the pressure reducing valve is connected with the second oil inlet pipe 7 of the switch valve 3, and the pressure reducing valve is connected with the forward oil pipe or the backward oil pipe of the pilot valve 5, so that the forward movement or the backward movement of the construction vehicle is controlled through the knob switch 2.
Further, as shown in fig. 1 to 4, the pilot valve 5 further includes a pilot valve oil inlet pipe 501 and a pilot valve oil outlet pipe 502; one end of the pilot valve oil inlet pipe 501 is communicated with the switch valve 3 through a first oil inlet pipe 6, and the other end of the pilot valve oil inlet pipe is communicated with a pilot valve oil inlet 5011 of a pilot valve 5; one end of the pilot valve oil outlet pipe 502 is communicated with the pilot valve oil outlet 5021, and the other end is communicated with the hydraulic oil tank 10.
When the change-over switch 1 is located the first gear that closes, the connection switch-on of change-over switch 1 and ooff valve 3, the oil in ooff valve 3 advances oil pipe 501 and gets into in the pilot valve 5 through first advancing oil pipe 6 inflow pilot valve, and the oil in the pilot valve 5 goes out oil pipe 502 inflow hydraulic tank 10 through the pilot valve in to make the traveling system can control the construction vehicle and advance.
Further, as shown in fig. 1 to 4, the oil line of the pressure reducing valve includes a pressure reducing valve oil inlet line 11 and a pressure reducing valve oil outlet line 12; one end of the pressure reducing valve oil inlet pipe 11 is communicated with the switch valve 3 through a second oil inlet pipe 7, and the other end of the pressure reducing valve oil inlet pipe is communicated with the pressure reducing valve; one end of the pressure reducing valve oil outlet pipe 12 is communicated with an oil outlet of the pressure reducing valve, and the other end is communicated with the hydraulic oil tank 10.
When the forward or backward control of the construction vehicle is required, the oil in the second oil inlet pipe 7 enters the pressure reducing valve through the pressure reducing valve oil inlet pipe 11 and flows into the hydraulic oil tank 10 through the pressure reducing valve oil outlet pipe 12, so that the oil pipe line is communicated, and the forward or backward control of the construction vehicle is realized.
As shown in fig. 1 to 4, the pressure reducing valve is divided into a first pressure reducing valve 401 and a second pressure reducing valve 402; the pressure reducing valve oil inlet pipe 11 is divided into a first pressure reducing valve oil inlet pipe 1102 and a second pressure reducing valve oil inlet pipe 1103; the pressure reducing valve outlet line 12 is divided into a first pressure reducing valve outlet line 1202 and a second pressure reducing valve outlet line 1203; one end of a first reducing valve oil inlet pipe 1102 is communicated with a reducing valve oil inlet 1101 of the first reducing valve 401, one end of a second reducing valve oil inlet pipe 1103 is communicated with a reducing valve oil inlet 1101 of the second reducing valve 402, and the other end of the first reducing valve oil inlet pipe 1102 is converged with the other end of the second reducing valve oil inlet pipe 1103 and communicated with a second oil inlet pipe 7; one end of the first reducing valve oil outlet pipe 1202 is communicated with a reducing valve oil outlet 1201 of the first reducing valve 401, one end of the second reducing valve oil outlet pipe 1203 is communicated with a reducing valve oil outlet 1201 of the second reducing valve 402, and the other end of the first reducing valve oil outlet pipe 1202 and the other end of the second reducing valve oil outlet pipe 1203 are converged and communicated and are communicated with the hydraulic oil tank 10.
The two pressure reducing valves can simply and conveniently control the forward movement or the backward movement of the construction vehicle, and the forward movement or the backward movement of the construction vehicle can be not influenced mutually.
Specifically, as shown in fig. 1-4, the forward oil pipes include a first forward oil pipe 801 and a second forward oil pipe 802, and the backward oil pipes include a first backward oil pipe 901 and a second backward oil pipe 902; the number of oil inlets and the number of oil outlets of the first reducing valve 401 and the second reducing valve 402 are multiple; oil outlets of the first reducing valves 401 are respectively communicated with a first forward oil pipe 801 and a second forward oil pipe 802, and oil inlets of the first reducing valves 401 are respectively communicated with a first backward oil pipe 901 and a second backward oil pipe 902; oil outlets of the plurality of second reducing valves 402 are respectively communicated with a first backward oil pipe 901 and a second backward oil pipe 902, and oil inlets of the plurality of second reducing valves 402 are respectively communicated with a first forward oil pipe 801 and a second forward oil pipe 802.
The number of oil outlets and oil inlets of the first pressure reducing valve 401 is four, wherein two oil outlets are respectively communicated with a first forward oil pipe 801 and a second forward oil pipe 802, and two oil inlets are respectively communicated with a first backward oil pipe 901 and a second backward oil pipe 902.
When forward operation is performed, hydraulic oil flows into the first forward oil pipe 801 and the second forward oil pipe 802 through two oil outlets of the first reducing valve 401 and flows into the pilot valve 5, and hydraulic oil in the first backward oil pipe 901 and the second backward oil pipe 902 flows out of the first reducing valve 401 through two oil inlets of the first reducing valve 401 and then flows into the hydraulic oil tank 10.
The number of oil outlets and oil inlets of the second pressure reducing valve 402 is four, wherein two oil outlets are respectively communicated with a first backward oil pipe 901 and a second backward oil pipe 902, and two oil inlets are respectively communicated with a first forward oil pipe 801 and a second forward oil pipe 802.
When the backward operation is performed, the hydraulic oil flows into the first backward oil pipe 901 and the second backward oil pipe 902 through two oil outlets of the second reducing valve 402 and flows into the pilot valve 5, and the hydraulic oil in the first forward oil pipe 801 and the second forward oil pipe 802 flows out of the first reducing valve 401 through two oil inlets of the second reducing valve 402 and flows into the hydraulic oil tank 10.
When the forward control of the construction vehicle is needed, the change-over switch 1 is pushed to the starting gear, the knob switch 2 is rotated to the forward gear A, the oil in the second oil inlet pipe 7 flows into the first pressure reducing valve 401 through the first pressure reducing valve 401 and flows into the pilot valve 5 through the first forward oil pipe 801 and the second forward oil pipe 802, the oil in the first backward oil pipe 901 and the second backward oil pipe 902 flows into the first pressure reducing valve oil outlet pipe 1202 through the first pressure reducing valve 401 and flows into the hydraulic oil tank 10, and therefore the forward control of the construction vehicle is achieved.
When the construction vehicle needs to be controlled to retreat, the change-over switch 1 is pushed to an opening gear, the knob switch 2 rotates to a retreat gear B, oil in the second oil inlet pipe 7 flows into the second pressure reducing valve 402 through the second pressure reducing valve oil inlet pipe 1103 and flows into the pilot valve 5 through the first retreat oil pipe 901 and the second retreat oil pipe 902, oil in the first advance oil pipe 801 and the second advance oil pipe 802 flows back into the second pressure reducing valve oil outlet pipe 1203 through the second pressure reducing valve 402 and then flows into the hydraulic oil tank 10, and therefore retreat control of the construction vehicle is achieved.
Further, as shown in fig. 1 to 4, the on-off valve 3 is an electromagnetic on-off valve, and the first pressure reducing valve 401 and the second pressure reducing valve 402 are electromagnetic pressure reducing valves.
The switch valve 3 adopts an electromagnetic switch valve, the pressure reducing valve adopts an electromagnetic pressure reducing valve, so that the flow direction and the pressure in the oil pipe can be stably controlled, and the electromagnetic switch valve and the electromagnetic pressure reducing valve can be connected with an electric control system, so that the whole device can realize automatic identification control.
Wherein, as shown in fig. 1-4, the utility model also provides an excavator, including foretell construction vehicle traveling system's safety device, still include: a first operating lever 13 and a second operating lever 14; the first operating rod 13 comprises a first oil supply interface 1301 and a second oil supply interface 1302, and the second operating rod 14 comprises a third oil supply interface 1401 and a fourth oil supply interface 1402; the first oil supply interface 1301 and the second oil supply interface 1302 are respectively and correspondingly communicated with the first forward oil pipe 801 and the first backward oil pipe 901; the third oil supply interface 1401 and the fourth oil supply interface 1402 correspond to the second forward oil pipe 802 and the second backward oil pipe 902, respectively.
The first operating rod 13 and the second operating rod 14 are communicated with the forward oil pipe and the backward oil pipe through oil supply interfaces, so that the operating rods can realize forward or backward control of the excavator during long-distance travel and can also realize travel control of the excavator in a non-excavation working state.
Specifically, as shown in fig. 1 to 4, the present invention further provides an excavator further comprising a main controller 15; the main controller 15 is electrically connected to the selector switch 1, the rotary switch 2, the on-off valve 3, the first pressure reducing valve 401, and the second pressure reducing valve 402 via signal lines, respectively.
The main controller 15 detects signals of the change-over switch 1, when the switch button is detected to be in a closed state, oil in the switch valve 3 enters the pilot valve 5 through the first oil inlet pipe 6, and the walking can be operated through the operating lever at the moment, so that the same walking operation performance as that of the existing excavator is realized.
When the switch button is detected to be in an opening state, the switch valve 3 is switched, the first oil inlet pipe 6 is cut off, and the second oil inlet pipe 7 is opened; at this time, the knob switch 2 is in a second closing gear, the main controller 15 does not output a signal to the pressure reducing valve, and the pressure reducing valve is in a disconnected state, so that the independent cut-off control of the whole walking system is realized.
When the switch button is detected to be in an opening state, the switch valve 3 is switched, the first oil inlet pipe 6 is cut off, and the second oil inlet pipe 7 is opened; at this time, the knob switch 2 is in the forward gear a, the main controller 15 gives an opening signal to the first pressure reducing valve 401, and the hydraulic oil enters the pilot valve 5 through the first forward oil pipe 801 and the second forward oil pipe 802 at the same time, so that the linear forward traveling is realized.
When the switch button is detected to be in an opening state, the switch valve 3 is switched, the first oil inlet pipe 6 is cut off, and the second oil inlet pipe 7 is opened; at this time, the knob switch 2 is in a backward gear B state, the main controller 15 gives a signal to the second reducing valve 402, and the hydraulic oil enters the pilot valve 5 through the first backward oil pipe 901 and the second backward oil pipe 902 at the same time, so that the linear backward traveling is realized.
By repeating the operation, the traveling system safety device of the construction vehicle can solve the technical problem that the construction vehicle needs to be operated for a long time when moving and traveling for a long distance due to the fact that an operator mistakenly touches the operating rod in construction operation to a certain extent.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A safety device of a construction vehicle traveling system, comprising: the oil inlet pipe comprises a change-over switch, a knob switch, a switch valve, a pressure reducing valve, a first oil inlet pipe and a second oil inlet pipe;
the switching valve is communicated with the first oil inlet pipe or the second oil inlet pipe, the first oil inlet pipe is used for supplying oil to a pilot valve of a traveling system, the second oil inlet pipe is communicated with the pressure reducing valve, and the pressure reducing valve is communicated with a forward oil pipe or a backward oil pipe of the pilot valve through an oil supply pipe;
the change-over switch is electrically connected with the switch valve and is used for controlling the connection and disconnection of the first oil inlet pipe and the second oil inlet pipe;
the knob switch is electrically connected with the pressure reducing valve and used for controlling the on-off of the forward oil pipe or the backward oil pipe of the pilot valve.
2. The safety device of a construction vehicle running system according to claim 1, wherein the changeover switch includes an on gear and a first off gear;
the first closing gear is used for enabling the switch valve to be communicated with the first oil inlet pipe, and the opening gear is used for enabling the reducing valve to be communicated with the second oil inlet pipe.
3. The safety device of a construction vehicle running system according to claim 2, wherein the knob switch includes a forward gear, a reverse gear, and a second off gear;
the forward gear is used for enabling the reducing valve to be communicated with the forward oil pipe of the pilot valve, the backward gear is used for enabling the reducing valve to be communicated with the backward oil pipe of the pilot valve, and the second closing gear is used for enabling the reducing valve to be disconnected with both the forward oil pipe and the backward oil pipe of the pilot valve.
4. The safety device of a construction vehicle running system according to claim 1, wherein the pilot valve further comprises a pilot valve oil inlet pipe and a pilot valve oil outlet pipe;
one end of the pilot valve oil inlet pipe is communicated with the switch valve through the first oil inlet pipe, and the other end of the pilot valve oil inlet pipe is communicated with a pilot valve oil inlet of the pilot valve;
one end of the pilot valve oil outlet pipe is communicated with the pilot valve oil outlet, and the other end of the pilot valve oil outlet pipe is communicated with the hydraulic oil tank.
5. The safety device of a construction vehicle running system according to claim 4, wherein the oil pipe of the relief valve includes a relief valve oil inlet pipe and a relief valve oil outlet pipe;
one end of the oil inlet pipe of the pressure reducing valve is communicated with the switch valve through the second oil inlet pipe, and the other end of the oil inlet pipe of the pressure reducing valve is communicated with the pressure reducing valve;
one end of the pressure reducing valve oil outlet pipe is communicated with an oil outlet of the pressure reducing valve, and the other end of the pressure reducing valve oil outlet pipe is communicated with the hydraulic oil tank.
6. The safety device of a construction vehicle running system according to claim 5, wherein the pressure reducing valve is divided into a first pressure reducing valve and a second pressure reducing valve;
the oil inlet pipe of the pressure reducing valve is divided into a first pressure reducing valve oil inlet pipe and a second pressure reducing valve oil inlet pipe;
the oil outlet pipe of the pressure reducing valve is divided into a first pressure reducing valve oil outlet pipe and a second pressure reducing valve oil outlet pipe;
one end of the first pressure reducing valve oil inlet pipe is communicated with a pressure reducing valve oil inlet of the first pressure reducing valve, one end of the second pressure reducing valve oil inlet pipe is communicated with a pressure reducing valve oil inlet of the second pressure reducing valve, and the other end of the first pressure reducing valve oil inlet pipe is converged and communicated with the other end of the second pressure reducing valve oil inlet pipe and is communicated with the second oil inlet pipe;
one end of the first pressure reducing valve oil outlet pipe is communicated with a pressure reducing valve oil outlet of the first pressure reducing valve, one end of the second pressure reducing valve oil outlet pipe is communicated with a pressure reducing valve oil outlet of the second pressure reducing valve, and the other end of the first pressure reducing valve oil outlet pipe is converged and communicated with the other end of the second pressure reducing valve oil outlet pipe and is communicated with the hydraulic oil tank.
7. The safety device of a construction vehicle running system according to claim 6, wherein the forward oil pipe comprises a first forward oil pipe, a second forward oil pipe, and the backward oil pipe comprises a first backward oil pipe and a second backward oil pipe;
the number of oil inlets and the number of oil outlets of the first reducing valve and the second reducing valve are multiple;
oil outlets of the first pressure reducing valves are respectively communicated with the first forward oil pipe and the second forward oil pipe, and oil inlets of the first pressure reducing valves are respectively communicated with the first backward oil pipe and the second backward oil pipe;
oil outlets of the second pressure reducing valves are respectively communicated with the first backward oil pipe and the second backward oil pipe, and oil inlets of the second pressure reducing valves are respectively communicated with the first forward oil pipe and the second forward oil pipe.
8. The safety device of a construction vehicle running system according to claim 7, wherein the switching valve is an electromagnetic switching valve, and the first pressure reducing valve and the second pressure reducing valve are electromagnetic pressure reducing valves.
9. A construction vehicle comprising the safety device of a construction vehicle running system according to claim 8, further comprising: a first operating lever and a second operating lever;
the first operating rod comprises a first oil supply interface and a second oil supply interface, and the second operating rod comprises a third oil supply interface and a fourth oil supply interface;
the first oil supply interface and the second oil supply interface are respectively and correspondingly communicated with the first forward oil pipe and the first backward oil pipe; the third oil supply interface and the fourth oil supply interface are respectively corresponding to the second forward oil pipe and the second backward oil pipe.
10. The construction vehicle according to claim 9, further comprising a main controller;
the main controller is electrically connected with the change-over switch, the knob switch, the switch valve and the first pressure reducing valve and the second pressure reducing valve through signal lines respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921000969.3U CN210597443U (en) | 2019-06-28 | 2019-06-28 | Safety device of construction vehicle traveling system and construction vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921000969.3U CN210597443U (en) | 2019-06-28 | 2019-06-28 | Safety device of construction vehicle traveling system and construction vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502232A (en) * | 2020-12-08 | 2021-03-16 | 雷沃工程机械集团有限公司 | Excavator control handle, traveling system and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502232A (en) * | 2020-12-08 | 2021-03-16 | 雷沃工程机械集团有限公司 | Excavator control handle, traveling system and excavator |
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